Pool Timer with Heater Delay Circuit

Often referred to as a "Fireman's Switch", these timers provide separate control of your pool pump and pool heater. This two-circuit time switch is designed to turn off the heater approximately 20 minutes before the filter pump is turned off. The time delay coordinates the switching of the heater and pump and eliminates pounding and knocking in pipes caused by overheated water. Reduces scale and lime deposits that can reduce equipment life.